/*******************************************************************************
* Copyright 2009, 2010 Lars Grammel
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
package org.thechiselgroup.choosel.protovis.client;
import static org.thechiselgroup.choosel.protovis.client.PVAlignment.BOTTOM;
import static org.thechiselgroup.choosel.protovis.client.PVAlignment.RIGHT;
import static org.thechiselgroup.choosel.protovis.client.PVAlignment.TOP;
import org.thechiselgroup.choosel.protovis.client.jsutil.JsArgs;
import org.thechiselgroup.choosel.protovis.client.jsutil.JsBooleanFunction;
import org.thechiselgroup.choosel.protovis.client.jsutil.JsDoubleFunction;
import org.thechiselgroup.choosel.protovis.client.jsutil.JsFunction;
import org.thechiselgroup.choosel.protovis.client.jsutil.JsStringFunction;
import com.google.gwt.core.client.JsDate;
import com.google.gwt.i18n.client.DateTimeFormat;
import com.google.gwt.user.client.ui.Widget;
/**
* Protovis/GWT implementation of <a href=
* "http://vis.stanford.edu/protovis/ex/crimea-stacked-bar.html" >Crimean war
* stacked bar chart example</a>.
*
* @author Lars Grammel
*/
public class CrimeaStackedBarChartExample extends ProtovisWidget implements
ProtovisExample {
public static enum Cause {
WOUNDS, OTHER, DISEASE;
public int getValue(CrimeanWarData d) {
switch (this) {
case WOUNDS:
return d.getWounds();
case OTHER:
return d.getOther();
case DISEASE:
return d.getDisease();
}
throw new RuntimeException("cannot be reached");
}
}
@Override
public Widget asWidget() {
return this;
}
private void createVisualization(CrimeanWarData[] crimea) {
final PVOrdinalScale fill = PV.colors("lightpink", "darkgray",
"lightblue");
final DateTimeFormat format = DateTimeFormat.getFormat("MMM");
int w = 545;
int h = 280;
final PVOrdinalScale x = PV.Scale.ordinal(crimea,
new JsFunction<JsDate>() {
@Override
public JsDate f(JsArgs args) {
CrimeanWarData d = args.getObject();
return JsDate.create(d.getDate().getTime());
}
}).splitBanded(0, w);
final PVLinearScale y = PV.Scale.linear(0, 2200).range(0, h);
PVPanel vis = getPVPanel().width(w).height(h).margin(19.5).right(40);
vis.add(PV.Layout.Stack()).layers(Cause.values()).values(crimea)
.x(new JsDoubleFunction() {
public double f(JsArgs args) {
CrimeanWarData d = args.getObject();
return x.fd(d.getDate());
}
}).y(new JsDoubleFunction() {
public double f(JsArgs args) {
CrimeanWarData d = args.getObject(0);
Cause t = args.getObject(1);
return y.fd(t.getValue(d));
}
}).layer().add(PV.Bar).antialias(false).width(x.rangeBand())
.fillStyle(new JsFunction<PVColor>() {
public PVColor f(JsArgs args) {
Cause d = args.getObject(1);
return fill.fcolor(d);
}
}).strokeStyle(new JsFunction<PVColor>() {
public PVColor f(JsArgs args) {
PVBar _this = args.getThis();
return _this.fillStyle().darker();
}
}).lineWidth(1).anchor(BOTTOM).add(PV.Label)
.visible(new JsBooleanFunction() {
public boolean f(JsArgs args) {
PVLabel _this = args.getThis();
return _this.parent().index() == 0
&& _this.index() % 3 == 0;
}
}).textBaseline(TOP).textMargin(5).text(new JsStringFunction() {
public String f(JsArgs args) {
CrimeanWarData d = args.getObject();
return format.format(d.getDate());
}
});
vis.add(PV.Rule).data(y.ticks(5)).bottom(y)
.strokeStyle(new JsStringFunction() {
public String f(JsArgs args) {
double d = args.getDouble();
return d != 0 ? "rgba(255, 255, 255, .7)" : "black";
}
}).anchor(RIGHT).add(PV.Label).textMargin(6);
}
@Override
public String getDescription() {
return null;
}
public String getProtovisExampleURL() {
return "http://vis.stanford.edu/protovis/ex/crimea-stacked-bar.html";
}
public String getSourceCodeFile() {
return "CrimeaStackedBarChartExample.java";
}
protected void onAttach() {
super.onAttach();
initPVPanel();
createVisualization(CrimeanWarData.getData());
getPVPanel().render();
}
public String toString() {
return "Crimean War Stacked Bar Chart";
}
}